Local JSON Formatter — Your Data Never Leaves Your Browser
Most JSON formatters are server-side: you paste your data, it gets sent to a remote API, formatted there, and returned. For API responses containing tokens, credentials, or personal data, that's a privacy risk you don't need. This tool formats JSON locally in your browser — no server, no network request, nothing logged.
Developers often paste JSON from API responses, database queries, or config files — data that can contain secrets, PII, or proprietary information. A local JSON formatter means none of that ever leaves your machine.
How to use it
- Paste your JSON into the input panel.
- Click Format or use the keyboard shortcut.
- Copy the formatted output — syntax-highlighted and indented.
- Use Minify to compact it back for production.
Why it matters
- Format JSON without uploading — runs 100% client-side.
- Validates JSON and shows clear error messages for syntax issues.
- Supports 2-space, 4-space, and tab indentation.
- Your JSON data never leaves your browser — no logs, no storage.
- Free with no limits, no signup, no ads blocking the tool.